Improvement in piston-bod packing



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SIDNEY S. TURNER, OF'WESTIBORO, MASSACHUSETTS. Letters Panam. 72,340, maDecember 17,1867.

IMPROVEMENT IN PISTON-ROD PAGKING.

@te ttetnle amat tt in this tzttrrt -gatmt mit mating ont uf' its anne.l

TO ALL WHOM IT MAY CONCERN:

Be it known that I, SIDNEY S.'TURNR,'of Westboro, in the county ofWorcester, in the State of Massaohusetts, have invented certain new anduseful Improvements in v:Packing-Boxes; and I do hereby declare that thefollowing is a full and exact description thereof, reference being hadto the accompanying drawings, and to the letters of reference markedthereon. p

The nature of my invention consists in so I that it shall be sustainedby a perforated cas'e or by bars, an thus be made to t closely to thepiston-rod.

To enable others skilled in the art to make a and use. In the drawings-Figure 1 represents an elevation ofsthe packing-box. Figure 2representsran elevation of the4 packing and its metallic supports D D'.Figure 3 is a verticalsection of my improved packing-box. Figure 4 is ahorizontal section of the same.

arranging theelastic packing of piston, valve, or other rods, so d besubject to the direct pressure of the steam, .and

nd vuse my invention, I will proceed to describe its construction Ifollowing manner: A, figs. 1 and 3, represents the outside casey Iconstruct my improved packing-box in the of the box, which may be madein the form represented in thevdrawiugs, or 'in any suitablevconvenientform that the style and size of the engine may lrequire. B is a cap orlid, which is attached to and forms a part of the packing-box. Crepresents the pistoulrod; D D', figs. 2, 3, and 4, represent a metalliccasing, which surrounds the packing and 'serves to keep it in position.This casing has perforations O'O, rigs. 2 and 4, so that the pressure ofthe steam may act directly upon the packingl?. The packing P is made 'ofrubber, or any suitable material, in the form 4of an elongated cylinder,as shownin figs, ,3 and 4, having flanges P I, iig.

upper packing-box. V,g. 3, is a valve, closing the port U, the object ofwhich is to prevent the escape'oi` st eaminto the cylinder when 'thatpart'of the cylinder is exhusting.

The advantages that I claim for my packing are, that it is simplein .itsarrangement, and that the pressure brought upon the piston-rod is alwaysin proportion to the pressure in the cylinder, so that with a lightpressure, the friction upon the piston .is slight. The acti I the portU, and acting through the perforations 0 O, figs.r 2 and 4, presses uponthe packing D, thusbearing it hard against the valve-stem, and thusmaintaining it, so long as there is anyzpressurc in the cylinder.l Thispacking-box is equally applicable to water-engines, pumps, heaters,'&c.

The peculiarity of my packing-arrangement is, thatI hold the packingbyfilts ends rigidly, by means of the flanges on the metallic casing DD', (figs. 2,3, and 4,) so that the packing is-not subjected to endwisepressure at all, the steam entering into the chambers around D'D, (iigs.3 and 4,) where it gets directly in a lateral line lto press the packingagainst the rod C.

What I claim as my invention, and desir The tubular elastic packing,confined rigidly by its ends,

the rod by the direct action of the steam or other mcdium'bf pressure,su

e to secure by Letters Patent of the United States, is

' so arranged as to be comprcssibl'c laterally against bstantially asand for the purpose set forth.

S.' S. TURNER.

Witnesses:

A. HUN BERRY, F. G. PARKER.

2, atits and lower end. U, iig. 3, is a passage' or port, leading from'the cylinder tothe interior chamber ofthe on of the pressure is this:Steam enters thepacking-boii through

